PHYHOO Jewelry Tool Rubber Rotary Tools Polishing Burr Dremel 10pcs Diamond-in-Rubber Emery Polishing Bit Set - Fits Dremel - Metal, Glass, Stone, Tile The diameter of the shank is 2.35mm 100% Brand new The polishing wheels are belong to the consumables Set of 10 Pieces of rubber burr dremel, polishing Tool, fit rotay tools grinder These are great for polishing jewelry or other metal working uses.they can be used with a dremel tool,fit for rotay tools grinder